Method of simulating a seam in foldable sheet material



NOV- 12, 1953 B. ANDERBERG 3,410,742

RETHOD OF SIMULATING A SE'AM IN FOLDABLE SHEET MATERIAL Filed Nov. l5, 1963 2 Sheets-Sham l F161 5 SW2 4 F|G.7

F|G 2 v 5 k\ \\A \\/4 Y l ,f @ff/@6m 1 s Fles 7) 5 Fuss FIGIO 7 4 1 Nov. l2, 1968 B. ANDERBERG 3,410,742

METHOD OF SIMULATING A SEAM IN FOLDABLE SHEET MATERIAL Filed Nov. l5, 1965 2 Sheets-Sheet 2 www United States Patent O 3,410,742 METHOD OF SIMULATING A SEAM IN FOLDABLE SHEET MATERIAL Berndt Anderberg, Jarnvagsgatan 19, Malmo SV, Sweden Filed Nov. 15, 1963, Ser. No. 324,074 Claims priority, application Sweden, Nov. 17, 1962,

5 Claims. (Cl. 156-196) The present invention relates to a method of treating objects consisting of at least one main piece of flexible material and having seams forming a boundary line between adjoining areas of the object to be treated, for instance different types of wearing apparel. The invention is applicable to all kinds of flexible materials that can be interconnected with the aid of any type of seams produced by means of thread, adhesives, etc. or by welding. The invention comprises the steps of arranging behind the main piece at said boundary line an auxiliary piece likewise of flexible material which is united with the main piece by a first seam coinciding with said boundary line, folding the main piece double along said first seam coinciding with said boundary line, uniting the superposed main piece portions resultingv from the doubling step by means of a second seam positioned in immediate vicinity to said fold, and then straightening and possibly ironing the main piece. The invention permits a much simpler manufacture than hitherto of objects having seams.

The above as well as further features of the invention and the advantages gained thereby will appear from the following description, reference being had to the accompanying drawings which show various ways of applying the invention to the sewing of wearing apparel, for instance of cloth, where the seams are formed by thread stitches. i

In the drawings:

FIGS. 1-6 show plan views and sections of the various steps of the method of the invention;

FIG. 7 shows a section of a modification of the method;

FIGS. 8-10 shows plan views and sections of a further modification of the method;

FIG. 11 shows a section of still another modification of the method;

FIG. 12 shows a plan view of still a further modification of the method;

FIG. 13 shows a rear view of a piece of ladys clothing made in accordance with the method.

The object to be treated which is but partly shown in FIGS. 1-6, consists of a main piece 1 of flexible material such as cloth having a boundary line 2 between two adjoining areas 3 and 4. In accordance with the invention, there is placed behind the main piece 1 at said boundary line an auxiliary piece 5 likewise of flexible material which is united with the main piece 1 by a first seam 6 coinciding with said boundary line (FIGS. 1 and 2). When the seam 6 has been completed in its entire extension (not shown) the main piece 1 (FIGS. 3 and 4) is folded double along said first seam 6, -which coincides with said boundary line 2, in that the area 4 of the main piece is placed on top of the area 3 thereof. The superposed main piece portions resulting from said folding and comprising areas 3 and 4 are united by a second seam 7 which is positioned in immediate vicinity to the fold, whereupon the main piece 1 is straightened and ironed if necessary. In the example of the inventive method described above the second seam 7 uniting the main piece portions 3 and 4 is placed in parallel with and in immediate vicinity to the first seam 6 so that the second CII 3,410,742 Patented Nov. 12, 1968 ICC seam not only binds together the main piece portions 3 and 4 but also connects these main piece portions 3, 4 a second time with the auxiliary piece 5. The straightening of the main piece 1 is effected lby folding the main piece 1 once more, this time in the direction opposite to the one in which the first folding was effected. In this case the main piece 1 will be S-shaped, as seen in cross section through the area of the boundary line 2 (FIG. 5). FIG. 6 shows the main piece in an ironed condition. In the modification shown in FIG. 7 and as indicated by a dash and dot line the main piece portion 3 is swung inwardly over the main piece porti-on 4 after the first seam 6 has been drawn to coincide with said boundary line 2, whereupon the main piece portions 3, 4 and the auxiliary piece 5 are connected together by means of the s-eam 7 in the manner described in the foregoing, the main piece 1 being finally straightened. l

As will appear from FIGS. 8-10 itis also possible to double both the main piece 1 and the auxiliary piece 5 after the first seam 6 has been drawn to coincide with the boundary line 2, and after the doubling operation to interconnect only the two main piece portions 3 and 4 by means of the second seam 7 positioned adjacent to the first seam 6. In the example shown the main piece 1 only is straightened. However, as appears from FIG. 1l in the case when only the main piece portions 3, 4 are 4connected together by means of the seam 7, one can straighten both the main piece 1 and the auxiliary piece 5 which results in an incomplete straightening of the:` first fold because of the seam 7 connecting together the main piece portions 3, 4. i

In the example shown in FIG. l2 the second seam 7 is positioned in such a manner that said second seam 7 will be spaced varying distances from the first searm 6. In the areas where the seam 7 is spaced the largest distance from the seam 6 most cloth will collect at the boundary line 2 between the adjoining areas 3 and 4 and as a consequence one obtains a tightening for instance at the waist of the garment formed by the main piece 1, as is shown by way of example in FIG. 13. The garment shown therein is made from a single piece of cloth and it exemplifies the practical and aesthetical advantages provided by the method according to the invention for tailor-made garments or ready-made clothes of textile materials. These advantages may, however, apply also to seam-welded or Iseamglued garments of plastic materials or combinations of plastic materials and natural or synthetic fibre materials. Also upholstery e.g. -for sitting furniture or motor-car seats of different types may constitute the object to be treated. Leather may also be employed for the purposes of the invention as upholstery for such furniture and as -material of wearing apparel.

The auxiliary piece 5 was described in the foregoing as a separate piece which was brought together with the garment formed by the main piece 1. But the auxiliary piece 5 :may also be a piece lying behind the main piece and normally constituting part of the wearing apparel.

It will 'be obvious to those skilled in the art that various changes may be made without departing from the scope of the invention, and therefore the invention is not limited to what is shown in the drawings and described in the specification but only as indicated in the appended claims.

What I claim and desire to secure by Letters Patent is:

1. A method of forming a fold in an undivided plain main piece of foldable fmaterial consisting in applying an auxiliary piece of foldable material behind said undivided plain main piece on one side of the fold to ibe formed, uniting said undivided plain amain piece and said auxiliary piece by a first seam, folding said undivided main piece double along said first seam, uniting the superimposed 3 portions of said undivided 'main ypiece resulting from said double folding of said undivided main piece by a second seam in the immediate vicinity of the fold of said undivided main piece, and then straightening the undivided main piece.

2. A method of 'fonrning a fold in an undivided plain main piece of foldable material consisting in applying an auxiliary piece of foldalble material behind said undivided plain main piece on One side of the fold to be formed, uniting said undivided plain `main piece and said auxiliary piece by a first seam, folding said undivided plain main piece ydouble along said first seam, folding said auxiliary piece double along said rst seam, uniting the superposed portions of said undivided main piece resulting from said double folding of said undivided main piece by a second seam in the immediate vicinity of the fold of said undivided main piece, and then straightening said undivided main piece and said auxiliary piece.

3. A method of forming a fold in an undivided plain main piece of foldable ymaterial consisting in applying an auxiliary piece of foldable material behind said undivided plain main piece on one side of the fold to be formed, uniting said undivided plain main piece and said auxiliary piece by a iirst seam, folding said undivided plain main piece double along said rst seam, uniting the supenposed portions of said undivided main piece resulting from said double folding of said undivided main piece and the auxiliary piece by a second seam in immediate vicinity of the fold of said undivided main piece, and then straightening and ironing said undivided main P1666.

4. A method of forming a fold in an undivided plain main -piece of foldable material consisting in app-lying an auxiliary piece of folda-ble material behind said undivided plain main piece on one side of the fold to be formed,

uniting said undivided :plain main piece and said auxiliary piece rby a iirst seam, 'folding said undivided main piece double along said rst seam, uniting the superposed portions of said undivided main piece resulting from said double folding of said undivided plain main piece by a second seam in the immediate vicinity of the fold of said undivided main piece and in parallel relationship with said first seam, forming a second fold by straightening the undivided main piece, and then ironing the undivided main piece.

5. A method of forming a fold in an undivided plain main piece of foldable material consisting in applying an auxiliary piece of foldable material behind said undivided plain lmain piece on one side of the fold to be formed, uniting said undivided plain main piece and said auxiliary piece by a rst seam, folding said undivided main piece double along said first seam, uniting the superposed portions of said undivided main piece resulting from said double folding of said undivided plain main piece by a second seam in the immediate vicinity of the fold of said undivided main piece in spaced varying distance from said first seam, forming a second fold by straightening the undivided main piece, and then ironing the straightened main piece.

References Cited UNITED STATES PATENTS 1,560,712 11/1925 Naylor 156-93 X 1,768,025 6/1930 Berger 112-268 X 2,169,590 `8/1939 Nyers 112-262 EARL M. BERGERT, Primary Examiner.

H. F. EPSTEIN, Assistant Examiner. 

1. A METHOD OF FORMING A FOLD IN AN UNDIVIDED PLAIN MAIN PIECE OF FOLDABLE MATERIAL CONSISTING IN APPLYING AN AUXILIARY PIECE OF FOLDABLE MATERIAL BEHIND SAID UNDIVIDED PLAIN MAIN PIECE ON ONE SIDE OF THE FOLD TO BE FORMED, UNITING SAID UNDIVIDED PLAIN MAIN PIECE AND SAID AUXILIARY PIECE BY A FIRST SEAM, FOLDING SAID UNDIVIDED MAIN PIECE DOUBLE ALONG SAID FIRST SEAM, UNITING THE SUPERIMPOSED PORTIONS OF SAID UNDIVIDED MAIN PIECE RESULTING FROM SAID DOUBLE FOLDING OF SAID UNDIVIDED MAIN PIECE BY A SECOND SEAM IN THE IMMEDIATE VICINITY OF THE FOLD OF SAID UNDIVIDED MAIN PIECE, AND THEN STRAIGHTENING THE UNDIVIDED MAIN PIECE. 